<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<%@ page import="java.sql.PreparedStatement" %>
<%@ page import="java.sql.ResultSet" %>

<%@ page import="java.sql.*" %><%--
  Created by IntelliJ IDEA.
  User: 了
  Date: 2020/10/9
  Time: 10:11
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
request.setCharacterEncoding("utf-8");
String username = request.getParameter("username");
String password = request.getParameter("password");
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/book";
    Connection connection = DriverManager.getConnection(url,"root","root");
    String sql = "select * from user where username = ? and password = ?";
    PreparedStatement ps = connection.prepareStatement(sql);

    ps.setString(1,username);
    ps.setString(2,password);

    ResultSet rs =ps.executeQuery();

    if (rs.next() ){
        session.setAttribute("username",username);
        response.sendRedirect("home.jsp");
    }else{
        out.print("登录失败，三秒后跳转到登录页面...");
        response.setHeader();
    }
%>
